amplification in WordNet English dictionary

1. (electronics) the act of increasing voltage or power or current
   amplification 
   
2. addition of extra material or illustration or clarifying detail
   "a few remarks added in amplification and defense"; "an elaboration of the sketch followed"
   amplification  elaboration 
   
3. the amount of increase in signal power or voltage or current expressed as the ratio of output to input
   amplification  gain